[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
SELECT 
	`main_site_template`.`ID` AS `ID`,
	`main_site_template`.`SITE_ID` AS `SITE_ID`,
	`main_site_template`.`CONDITION` AS `CONDITION`,
	`main_site_template`.`SORT` AS `SORT`,
	`main_site_template`.`TEMPLATE` AS `TEMPLATE`
FROM `b_site_template` `main_site_template` 

ORDER BY `SITE_ID` ASC
/home/bitrix/www/bitrix/modules/main/lib/db/mysqliconnection.php:149
#0: Bitrix\Main\DB\MysqliConnection->queryInternal
	/home/bitrix/www/bitrix/modules/main/lib/db/connection.php:331
#1: Bitrix\Main\DB\Connection->query
	/home/bitrix/www/bitrix/modules/main/lib/orm/query/query.php:3590
#2: Bitrix\Main\ORM\Query\Query->query
	/home/bitrix/www/bitrix/modules/main/lib/orm/query/query.php:972
#3: Bitrix\Main\ORM\Query\Query->exec
	/home/bitrix/www/bitrix/modules/main/lib/orm/data/datamanager.php:499
#4: Bitrix\Main\ORM\Data\DataManager::getList
	/home/bitrix/www/bitrix/modules/webdebug.seo/include.php:236
#5: WD\Seo\Helper::getCrmSites
	/home/bitrix/www/bitrix/modules/webdebug.seo/lib/canonical.php:258
#6: WD\Seo\Canonical::isAllowed
	/home/bitrix/www/bitrix/modules/webdebug.seo/lib/canonical.php:41
#7: WD\Seo\Canonical::onBeforeEndBufferContent
	/home/bitrix/www/bitrix/modules/webdebug.seo/lib/eventhandler.php:63
#8: WD\Seo\EventHandler::onBeforeEndBufferContent
	/home/bitrix/www/bitrix/modules/main/tools.php:5253
#9: ExecuteModuleEventEx
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:3363
#10: CAllMain->EndBufferContent
	
#11: ob_end_flush
	/home/bitrix/www/bitrix/modules/main/classes/general/main.php:3648
#12: CAllMain::{closure}
	
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